- Preferred Citation:
- "Smelting works owned by Empire Copper Company, Mackay, Idaho.", Northwest Historical Postcards Collection, Digital Initiatives, University of Idaho Library
- Reference Link:
- Material determined to be in Public Domain based on date of publication. Material made available by the University of Idaho Library. For more information, please contact University of Idaho Library Special Collections and Archives Department at firstname.lastname@example.org.
- Standardized Rights: